$ git clone -n https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs-sys.git /var/lib/mock/f40-build-59000796-6570126/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs-sys
Cloning into '/var/lib/mock/f40-build-59000796-6570126/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs-sys'...
$ git fetch origin 3088e5dee505b83904ae6fec6edbc76335ce580a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs-sys
 * [new ref]         3088e5dee505b83904ae6fec6edbc76335ce580a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3088e5d Update to version 0.4.1